Abstract
Summary
Chromatography on DEAE cellulose and susceptibility to inactivation by 2-mercaptoethanol indicate that the major portion of the agglutinins in patients”sera for 7 types of leptospirae are 19S macroglobulins even at 4 to 8 weeks following the onset of symptoms. A distinctly greater proportion of the agglutinins for L. sejroe was found in the 7S fraction of patients”sera. The agglutinins produced in rabbits following the injection of L. pomona and L. sejroe were initially almost entirely in the 19S fraction of serum but appeared also in the 7S fraction as time progressed. L. sejroe showed a greater tendency to elicit the production of 7S agglutinins in the rabbit than did L. pomona.
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